Brain Derived Neurotrophic Factor as a Predictor of Response to Treatment in Bipolar Depression and Mania
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ClinicalTrials.gov Identifier: NCT00879632
Verified February 2011 by Hospital de Clinicas de Porto Alegre. Recruitment status was: Recruiting
: April 10, 2009
Last Update Posted
: February 16, 2011
Hospital de Clinicas de Porto Alegre
National Alliance for Research on Schizophrenia and Depression
There is sound evidence that quetiapine is effective in the treatment of manic and depressive episodes associated with Bipolar Disorder (BD) (Yatham et al 2006). However, even with the development of effective new treatment options, not all patients respond to treatments available. Biological markers have been investigated as predictors of response to treatment and of remission of symptoms. This would explain in part the individual's differences in the response to treatment, taking into account the genetic variability plus environmental factors influencing specific biological markers. A potential biological marker of response to treatment in BD would be the levels of neurotrophins, as they are, in fact, altered during acute mood episodes (Cunha et al 2006). Among neurotrophins, the Brain-Derived Neurotrophic Factor (BDNF) has been repeatedly and consistently reported to be associated with BD physiopathology (Post 2007). Furthermore, medications that are known to be effective in BD, like lithium and divalproex, increase BDNF levels.
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Ages Eligible for Study:
18 Years to 65 Years (Adult)
Sexes Eligible for Study:
Accepts Healthy Volunteers:
Bipolar disorders patients during acute mania or depression using treatment as usual
Provision of written informed consent
A diagnosis of Bipolar Disorder I by Diagnostic and Statistical Manual of Mental Disorders- Fourth Edition revised (DSM-IV-TR)
Males and females aged 18 to 65 years
Female patients of childbearing potential must be using a reliable method of contraception and have a negative urine human chorionic gonadotrophin (HCG) test at enrolment
Able to understand and comply with the requirements of the study
Currently experiencing a manic, depressive or mixed mood episode, according to DSM-IV-TR. Patients must have a clear DSM-IV diagnosis, confirmed by SCID interview (Structured Clinical Interview for DSM disorders).
Pregnancy or lactation
Any DSM-IV Axis I disorder not defined in the inclusion criteria
Patients who, in the opinion of the investigator, pose an imminent risk of suicide or a danger to self or others
Use of any of the following cytochrome P450 3A4 inhibitors in the 14 days preceding enrolment including but not limited to: ketoconazole, itraconazole, fluconazole, erythromycin, clarithromycin, troleandomycin, indinavir, nelfinavir, ritonavir, fluvoxamine and saquinavir
Use of any of the following cytochrome P450 3A4 inducers in the 14 days preceding enrolment including but not limited to: phenytoin, carbamazepine, barbiturates, rifampin, St. John's Wort, and glucocorticoids
Currently on psychotropic medication or administration of a depot antipsychotic injection within one dosing interval (for the depot) before randomisation. Wash-out of minimum of 2 weeks will be required for intake. Fluoxetine use or depot antipsychotics will require 6 weeks of wash-out prior to intake.
Substance or alcohol dependence at enrolment (except dependence in full remission, and except for caffeine or nicotine dependence), as defined by DSM-IV criteria
Opiates, amphetamine, barbiturate, cocaine, cannabis, or hallucinogen abuse by DSM-IV criteria within 4 weeks prior to enrolment
Medical conditions that would affect absorption, distribution, metabolism, or excretion of study treatment
Unstable or inadequately treated medical illness (e.g. congestive heart failure, angina pectoris, hypertension) as judged by the investigator
Involvement in the planning and conduct of the study
Previous enrolment in the present study.
Participation in another drug trial within 4 weeks prior enrolment into this study or longer in accordance with local requirements
A patient with Diabetes Mellitus (DM) fulfilling one of the following criteria:
Unstable DM defined as enrolment glycosylated hemoglobin (HbA1c) >8.5%.
Admitted to hospital for treatment of DM or DM related illness in past 12 weeks.
Not under physician care for DM
Physician responsible for patient's DM care has not indicated that patient's DM is controlled.
Physician responsible for patient's DM care has not approved patient's participation in the study
Has not been on the same dose of oral hypoglycaemic drug(s) and/or diet for the 4 weeks prior to screening. For thiazolidinediones (glitazones) this period should not be less than 8 Weeks.
Taking insulin whose daily dose on one occasion in the past 4 weeks has been more than 10% above or below their mean dose in the preceding 4 weeks Note: If a diabetic patient meets one of these criteria, the patient is to be excluded even if the treating physician believes that the patient is stable and can participate in the study.